Chordata Bateson, 1885 - chordates
   Class Elasmobranchii Bonaparte, 1838 see Subclass Elasmobranchii Bonaparte, 1838
     Subclass Selachii see Subdivision Selachii
       Order Euselachii Hay, 1902 see Infraclass Euselachii Hay, 1902
         Suborder Galei see Superorder Galeomorphi (Compagno, 1973)
           Series Galeoidei see Order Carcharhiniformes Compagno, 1973
             63 Family Galeidae Fowler, 1934, nom. illeg. see Family Scyliorhinidae Gill, 1862
             64 Family Sphyrnidae Gill, 1872 - hammerhead sharks
             65 Family Pristiophoridae Bleeker, 1859 [monotypic] - saw sharks
             66 Family Pliotremidae [monotypic] see Family Pristiophoridae Bleeker, 1859